Illustration by:

http://clearpop.com

https://clipartxtras.com/categories/view/38d733766e5969b15bb16eb71a22881585694e6d/ear-infection-clipart.html

https://howthelightgetsinblog.com/2013/11/09/eyeball-adventures/

https://eyedepartment.com/pink-eye-facts/

https://ctsinuscenter.com/blog/children-sinusitis-allergic-shiners/

https://jp.123rf.com/photo_66667691_鼻水鼻%E3%80%82彼の鼻孔から滴る緑のスライム%E3%80%82ナリスの大きな鼻くそ.html

https://medcomic.com/medcomic/typical-community-acquired-pneumonia/

http://blog.knittingatlarge.com/2010/03/walking-pneumonia.html